Business Segment, Geographic Area, Product/Service Offerings and Significant Customer Information - Summary of Net Revenues by Major Customers (Detail) - Sales Revenue, Net [Member] - Customer Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Lam Research Corporation [Member]
Segment Reporting Information [Line Items]
Percentage of total net revenues	13.50%	8.50%	10.80%
Applied Materials, Inc. [Member]
Segment Reporting Information [Line Items]
Percentage of total net revenues	10.60%	9.30%	11.70%